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A PriorityQueue holds elements on a priority heap, which orders the elements
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A counting semaphore. Conceptually, a semaphore maintains a set of permits. Each
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This class provides access to implementations of cryptographic ciphers for
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An interface for the creation of Connection objects which represent a connection
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This is the central class in the log4j package. Most logging operations, except
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A Rectangle specifies an area in a coordinate space that is enclosed by the
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